March 1, 2017 8:42pm ESTMarch 1, 2017 8:42pm ESTMLB, English, NewsMLB and HBO have entered into an agreement whereby Game of Thrones will be promoted at ballparks this summer.MLB Game of Thrones cross-promotion(MLB)

If you go to a baseball game this summer, you may come away with some Game of Thrones merchandise.

That’s because MLB and HBO have entered into an agreement whereby the hit show will be promoted at ballparks. Nineteen MLB teams are participating with more expected to sign on, SportsBusiness Daily reports.

Details in terms of what fans will find at which games are still being worked out and will vary by team, Deadline.com notes. The cross-promotion will include special collectibles and co-branded merchandise, ticket packages, giveaways, theme nights and social media events.

MLB cross-promoting with an entertainment franchise is not a new concept, but the effort around Game of Thrones will be relatively big in scope.

“This was something we could do on a much larger scale with a partner we’re much closer to,” MLB executive vice president of business Noah Garden said. “(There will be) a tremendous amount of tie-ins, not to mention what’s going to happen locally with each club.”

One benefit MLB sees with associating itself with the show: Reaching the elusive millennial audience.

While the seventh season of Game of Thrones will run during baseball season, news of the cross-promotion does not bring with it an exact launch date. There are no tie-ins to the All-Star Game.